// script.aculo.us builder.js v1.7.0, Fri Jan 19 19:16:36 CET 2007

// Copyright (c) 2005, 2006 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
//
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/

var Builder = {
    NODEMAP: {
        AREA: 'map',
        CAPTION: 'table',
        COL: 'table',
        COLGROUP: 'table',
        LEGEND: 'fieldset',
        OPTGROUP: 'select',
        OPTION: 'select',
        PARAM: 'object',
        TBODY: 'table',
        TD: 'table',
        TFOOT: 'table',
        TH: 'table',
        THEAD: 'table',
        TR: 'table'
    },
    // note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken,
    //       due to a Firefox bug
    node: function(elementName) {
        elementName = elementName.toUpperCase();
    
        // try innerHTML approach
        var parentTag = this.NODEMAP[elementName] || 'div';
        var parentElement = document.createElement(parentTag);
        try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
            parentElement.innerHTML = "<" + elementName + "></" + elementName + ">";
        } catch(e) {}
        var element = parentElement.firstChild || null;
      
        // see if browser added wrapping tags
        if(element && (element.tagName.toUpperCase() != elementName))
            element = element.getElementsByTagName(elementName)[0];
    
        // fallback to createElement approach
        if(!element) element = document.createElement(elementName);
    
        // abort if nothing could be created
        if(!element) return;

        // attributes (or text)
        if(arguments[1])
            if(this._isStringOrNumber(arguments[1]) ||
                (arguments[1] instanceof Array)) {
                this._children(element, arguments[1]);
            } else {
                var attrs = this._attributes(arguments[1]);
                if(attrs.length) {
                    try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
                        parentElement.innerHTML = "<" +elementName + " " +
                        attrs + "></" + elementName + ">";
                    } catch(e) {}
                    element = parentElement.firstChild || null;
                    // workaround firefox 1.0.X bug
                    if(!element) {
                        element = document.createElement(elementName);
                        for(attr in arguments[1]) 
                            element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
                    }
                    if(element.tagName.toUpperCase() != elementName)
                        element = parentElement.getElementsByTagName(elementName)[0];
                }
            } 

        // text, or array of children
        if(arguments[2])
            this._children(element, arguments[2]);

        return element;
    },
    _text: function(text) {
        return document.createTextNode(text);
    },

    ATTR_MAP: {
        'className': 'class',
        'htmlFor': 'for'
    },

    _attributes: function(attributes) {
        var attrs = [];
        for(attribute in attributes)
            attrs.push((attribute in this.ATTR_MAP ? this.ATTR_MAP[attribute] : attribute) +
                '="' + attributes[attribute].toString().escapeHTML() + '"');
        return attrs.join(" ");
    },
    _children: function(element, children) {
        if(typeof children=='object') { // array can hold nodes and text
            children.flatten().each( function(e) {
                if(typeof e=='object')
                    element.appendChild(e)
                else
                if(Builder._isStringOrNumber(e))
                    element.appendChild(Builder._text(e));
            });
        } else
        if(Builder._isStringOrNumber(children)) 
            element.appendChild(Builder._text(children));
    },
    _isStringOrNumber: function(param) {
        return(typeof param=='string' || typeof param=='number');
    },
    build: function(html) {
        var element = this.node('div');
        $(element).update(html.strip());
        return element.down();
    },
    dump: function(scope) { 
        if(typeof scope != 'object' && typeof scope != 'function') scope = window; //global scope 
  
        var tags = ("A ABBR ACRONYM ADDRESS APPLET AREA B BASE BASEFONT BDO BIG BLOCKQUOTE BODY " +
            "BR BUTTON CAPTION CENTER CITE CODE COL COLGROUP DD DEL DFN DIR DIV DL DT EM FIELDSET " +
            "FONT FORM FRAME FRAMESET H1 H2 H3 H4 H5 H6 HEAD HR HTML I IFRAME IMG INPUT INS ISINDEX "+
            "KBD LABEL LEGEND LI LINK MAP MENU META NOFRAMES NOSCRIPT OBJECT OL OPTGROUP OPTION P "+
            "PARAM PRE Q S SAMP SCRIPT SELECT SMALL SPAN STRIKE STRONG STYLE SUB SUP TABLE TBODY TD "+
            "TEXTAREA TFOOT TH THEAD TITLE TR TT U UL VAR").split(/\s+/);
  
        tags.each( function(tag){ 
            scope[tag] = function() { 
                return Builder.node.apply(Builder, [tag].concat($A(arguments)));  
            } 
        });
    }
}
